Just be sure the optical out of the TV can be set to "PCM" and isn't fixed to Dolby Digital.
From the FiiO TAISHAN-D03K description: "....The input will accept up to 24-bit/192 kHz resolution PCM digital audio, but Dolby Digital and DTS are not supported."
Otherwise, you'll need something more expensive like this:
https://www.bhphotovideo.com/c/product/660218-REG/Gefen_GTV_DD_2_AA_GTV_DD_2_AA_GefenTV_Digital_Audio.html
From the FiiO TAISHAN-D03K description: "....The input will accept up to 24-bit/192 kHz resolution PCM digital audio, but Dolby Digital and DTS are not supported."
Otherwise, you'll need something more expensive like this:
https://www.bhphotovideo.com/c/product/660218-REG/Gefen_GTV_DD_2_AA_GTV_DD_2_AA_GefenTV_Digital_Audio.html